H2 ManyToMany填充

CREATE TABLE entity1 (
    id INT PRIMARY KEY,
    name VARCHAR(255)
);

CREATE TABLE entity2 (
    id INT PRIMARY KEY,
    name VARCHAR(255)
);

CREATE TABLE entity1_entity2 (
    entity1_id INT,
    entity2_id INT,
    PRIMARY KEY (entity1_id, entity2_id),
    FOREIGN KEY (entity1_id) REFERENCES entity1(id),
    FOREIGN KEY (entity2_id) REFERENCES entity2(id)
);

INSERT INTO entity1 (id, name) VALUES (1, 'Entity 1');
INSERT INTO entity1 (id, name) VALUES (2, 'Entity 2');

INSERT INTO entity2 (id, name) VALUES (1, 'Entity 3');
INSERT INTO entity2 (id, name) VALUES (2, 'Entity 4');

INSERT INTO entity1_entity2 (entity1_id, entity2_id) VALUES (1, 1);
INSERT INTO entity1_entity2 (entity1_id, entity2_id) VALUES (1, 2);
INSERT INTO entity1_entity2 (entity1_id, entity2_id) VALUES (2, 1);